Frequencies for first 10,000 rows of nselfpay variable in namcs2013 dataset :

 Type of payments |
accepted from new |
        patients: |
         Self-pay |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |          3        0.03        0.03
          Unknown |        176        1.76        1.79
   Not applicable |        361        3.61        5.40
Refused to answer |          6        0.06        5.46
              Yes |      9,118       91.18       96.64
               No |        336        3.36      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017